Compound locomotive.



H. R. STAFFORD.

oomnounn LoooMoTIvE. APPLICATION FILED ITB. 12, 1913 1,066,334, Patented July 1, 1913.

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COLUMBIA PLANCCIRAPH c0.,wSH|NTuN. D. c.

H. B.. STAFFORD. GOMPOUND LOGOMOTIVE. APPLIGATION PILBD rmmz, 19`xs.

Patented July 1, 1913.

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coLuMxA PLANOGRAPH CO..WASHINGTDN. D. C.

HAL R. STAFFORD, 0F SCHENECTADX, NEW YORK.

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Specifcaton of Letters Patent.

Patented July 1, 1,913.

Original application ,tiled [December 7, 1912, Serial N o. 73545x3. Divided andthis application yfiled Lll'seoruary ,12, 19.13. serial' no. 747,925.

To all whom t may] concern Be it known that I, HAL R. STAFFORD, ot

Schenectady, in the county of Schenectady and State of New York, have invented a certain -new and useful Imlzirovement 1n Compound Locomotives, of which improvement the following is a specification.

My invention, while more,particularly designed `'for application in compound locomotives of the articulated or Mallet ,type, is adaptable, similarly and with equally are vantageous results, in those of the cross .Compound 7 type, @11d its Objects are to effect a general simplification of structures, and effect a reduction of the undue and objectionable steamleakages which are ordinarily experienced by providing for the conveyance of the various vents, drains, and reliet passages to the exhaust passage and thence to .the stack, and by effecting a reduction inthe ln the accompanying drawings.: Figure l is a horizontal section through a high pressure distribution valve chest and v.its exhaust passages, of a compound locomotive embodying my inventiomon theline a a ofFig. 2; Fig. 2, a vertical transverse section through a high pressure lcylinder and its valve chest, on the line Z) ,o of Fig. l; Fig. 3, a similar' section through one ofthe low `pressure cylinders; Fig. 4, a longitudinal central section, on an enlarged scale, through a by-pass vent valve; and, Fig. 5, an end `view of the same.

motive. A nozzle, 12g, is formed on the topl oi' each of the .valve chests, 12C, which are,

-in this instance, shown as designed for the reception of inside admission piston valves, although they may obviously be adapted for use with any other desired construction of distribution valves. Flanges 12h, are formed 4on the half saddles, l2, for connectionto the yside members of the Vrear frame, 8, andthe inner vertical faces of the halt saddles, which are .finished truly, abut in the 1lengitudinal .central plane ot' the locomotive, the ,half saddles being connected by bolts passing through (flanges, 122 in the ordinary manner.

ln' locomotives of the articulated coinpound type, as constructed prior to my invention, it has ordinarily been the practice to forinthe chamber or casing of the Aintercepting valve mechanism, integral with one of ,the high pressure cylinder half saddles. This practice is objectionable in the particulars of involving the necessity of making .right and left hand cylinder castings, which arekcomplicated and expensive to ,mold, and cause a considerable vloss when a Acasting proves defective, and of the integral intercepting valve `chambers being more inconvenient and expensive to'bore out than lit made in a smaller separate casting. These objections areobviated under my invention, by providing two interchangeable high pressure cylinders, neither of which contains an intercepting valve chamber, and forming said chamber in a separate casting. To `.this end, the exhaust passage, 1212er' each'high pressure cylinder, vextends transversely in the half saddle, l2, from thevalve chest, 12C, nearly to ,the inner wall ot the halt saddle, and thence extends longitudinally to the front and the rear walls thereof, in which it terminatesv by nozzles or openings, 12m,

Aadapted :tor connection to theouter ends ot the exhaust passage, 1:7?, of arseparateintercepting and direct' exhaust valve chamber', ball joint rings, 171, being interposed at the joints, to insure tightness while permitting a limiteddegree of relative movement. In this, asin all other particulars, the twohigh vpressure cylinders are counterparts rand interchangeable, andtheretore either endof the half Isaddles `maybe connected to theV in- .terceptingvalve chamber. As shown in Fig. l, the openings, 12m, oppositethoseto which the intercepting valve chamber is connected, are closedv by plugs, 12, Vthe inner ends of which are curved in conformity with the curvature oi the turn of the exhaustpassage .toward the intercepting valve Chamber, lVhile the exhaust passage, 12k, is shown in Fig. l, as bifurcated and leading to opposite ends o't the valve chests, it will be obvious that such bifurcation is merely incidental to the employment of an inside admission piston distribution valve, for the application of which, the construction shown is designed, and that if an outside admission valve is used, the exhaust passage Will extend in the plane of the line, b b, to the valve chest.

The low pressure cylinders, 12f, are each cast integral with a half saddle, 12, the half saddles having flanges, 12p, through which they are bolted to the rails of the frontframe, 8, of the locomotive, and being secured together in the central longitudinal plane of the locomotive by bolts passing through flanges, 12R The low pressure cylinders are, similarly to the high pressure cylinders, duplicates and interchangeable, and steam passages, 12S, communicating with one of the branches of a receiver pipe, and leading to the ends of the low pressure valve chests, 12b, are formed in the half saddles,

as are also exhaustpassages, 191i, leading from the valve chests to a connection With the ordinary exhaust pipe in the smoke box.

l15, is fitted in a cage or chest, 15, secured 30' 'valve cont-rolling a vent opening, 15b, leadin the wall of the exhaust passage, 122 said ing through the cage, from the passage, 14, to the exhaust passage, and seating normally in the direction of the passage, 14. The vent valve which is herein shown, is of the ball type, but may be of any other suitable and preferred construction, and by its application, the discharge of steam is effected through the exhaust pipe and stack, and gases from the front end, which Would gum up the by-pass valve seats, are prevented from being drawn in from the exhaust passage.

The construction herein described is shown and described, but not claimed, in an application led by me, December 7, 1912, Ser. No. 735,453, of which this application is a division.

I claim as my invention and desire to secure by Letters Patent:

1. In a compound engine, a high pressure cylinder having an integral valve chest and half saddle and an exhaust passage extending directly from its valve chest to an opening in an end Wall of its half saddle.

2. In a compound engine, a high pressure cylinder having an integral valve chest and half saddle and an exhaust passage extending directly from its valve chest to opposite openings in the end Walls of its half saddle.

3. In a compound engine, the combination of a high pressure cylinder having an integral valve chest and half saddle and an exhause passage extending directly from its valve chest and turned in opposite directions to openings in the end Walls of its half saddle, and a plug closing one of said openings, and having its inner end curved in the direction of curvature of the opposite turn of the exhaust passage.

4. In a compound engine, the combination of tvvo counterpart high pressure cylinders, each having an integral valve chest and half saddle and an exhaust passage terminating at one end of the half saddle, and an intercepting valve mechanism casing connected to the half saddles and having exhaust passages communicating With the exhaust passages thereof.

5. In a compound engine, the combination of tvvo high pressure cylinders, each having an integral valve chest and half saddle and an exhaust passage extending directly from its valve chest and turned in opposite directions to openings in the end Walls of its half saddle, an intercepting valve mechanism casing connected to the half saddles and having exhaust passages communicating with the exhaust passages thereof, and plugs closing the openings of the half saddles further from said casing and having their inner ends curved inthe direction of curvature of the exhaust passages toward said casing.

6. In a compound engine, the combination of a cylinder1 having a by-pass passage for establishing communication between its opposite ends, a valve chamber fixed in the Wall of said passage, and a valve Working in said chamber and controlling communication betvveen said passage and the exhaust passage of the cylinder.

7. In a compound engine, the combination of a cylinder having a by-pass passage for establishing communication between its opposite ends, a valve chamber fixed in the Wall of said passage, and a valve seating by gravity in said chamber and exposed to pressure in said passage in direction to be unseated, said valve controlling communication, through said chamber, between said passage and the exhaust passage of the cylinder.

HAL R. STAFFORD. Witnesses FRANK F. SoovrLLE, W. Irl. Ln VAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

